#include<iostream>
using namespace std;

short tran(unsigned short int a, unsigned short int b);

void main(void)
{
	unsigned short int a, b;
	short int c;
	
	cout << "please input num" << endl;
	cin >> a;
	cin >> b;
	c = tran(a,b);
	cout << "output" << c;
}

short tran(unsigned short int a, unsigned short int b)
{
	if (b == 0)
		return -1;
	else
		return a / b;
}